Audi A6 C7 Engine Water Coolant Pipe Hose Tube Line 2.0 TDI Diesel 4G0819350S

Audi A6 C7 Engine Water Coolant Pipe Hose Tube Line 2.0 TDI Diesel is an original cooling system component designed for 2.0 TDI diesel engines. Thanks to its factory geometry and fitment, it ensures stable coolant flow and supports safe heat dissipation from the engine, which translates into predictable performance of the entire powertrain.

Specifications and technical data

• SKU: 4G0819350S
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0819350S
• Substitutable numbers: 4G0819350S, 4G0 819 350 S
• Fuel type: Diesel
• Part type: Hose
• Category: Coolant Hoses

Purpose and function in the cooling system

The pipe belongs to the Cooling system pipes and hoses group and is responsible for transporting coolant between engine components and accessories. In the 2.0 TDI diesel engine, proper fluid flow is crucial for:

• maintaining a stable operating temperature of the power unit,
• protection against overheating during city and highway driving,
• maintaining thermal efficiency under higher loads typical for diesel engines. Thanks to its fitment for the specific 2.0 TDI unit configuration, the pipe allows for maintaining the factory cooling line routing, which facilitates installation and reduces the risk of stress or leaks.

Original origin and fitment for Audi

The component was designed by Audi for integration with the factory cooling system in the A6 C7 model. This means:

• preservation of original mounting points and pipe routing,
• compatibility with stock connectors and other cooling hoses,
• consistency with diesel engine operating parameters, including thermal loads typical for TDI engines. Such a solution minimizes the need for modifications and allows for installation based on factory service procedures, which is particularly important for maintaining system performance predictability.

Characteristics of the used component

The pipe comes from dismantling, which allows combining original manufacturer specifications with a more favorable purchase cost compared to a new replacement. A used cooling system component is a good solution when:

• you want to maintain factory-quality fitment without resorting to cheaper, unreliable replacements,
• you need a part with a known design, compliant with Audi service documentation,
• you are planning a cooling system repair in a way that is as close as possible to the OEM standard. Before installation, a standard check of tightness, the condition of the connectors, and surfaces interacting with clamps is recommended to ensure proper operation of the entire system after replacement.

Importance for the durability of the 2.0 TDI diesel engine

In diesel engines, the cooling system operates under higher thermal loads than in many gasoline engines. A functional water coolant pipe:

• stabilizes engine operating temperature during long-term driving under load,
• reduces the risk of local overheating, which can accelerate the wear of internal components,
• supports uniform heat dissipation from the block and cylinder head, which is important for seal longevity. By maintaining the factory pipe geometry, the coolant flow designed by the manufacturer can be preserved, which promotes stable operation of the 2.0 TDI engine under various operating conditions. If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional pipes, return hoses, or sections connecting to the radiator, check the available parts in the Audi cooling system pipes and hoses category. To better plan service work related to the vehicle's thermal system and understand when it is worth reaching for original used components, the article on our blog may be helpful: Lack of cooling in the car: original used air conditioning compressor as a proven alternative to expensive new products.